Circular profile backup rods DURArods -A Backer rod is a closed-cell polymer-based product with a circular profile ideal for backup to sealants. It ensures optimum bonding of sealant with masonry, aluminium, or other substrates & helps to maintain the desired thickness of sealant at the joint’s center. It does not bond with cold-applied sealants. It is used as a backup to sealants in expansion joints and structural glazing systems.
